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Title: High-pressure hydrogen decompression in sulfur crosslinked elastomers

Journal Article · · International Journal of Hydrogen Energy

High-pressure storage and cyclic (de)pressurization of hydrogen gas is known to result in degradation and failure of gas canisters, hoses, linings, and O-rings as the relatively small hydrogen molecule can readily permeate most materials. Hence, identifying material compositions that are less susceptible to hydrogen-induced damage is of significant importance to the hydrogen energy infrastructure. Here, we use classical atomistic molecular dynamics simulations to study hydrogen exposed ethylene-propylene-diene monomer (EPDM) rubber, an elastomer typically used in O-rings. We make chemical modifications to the model by adjusting the crosslink density and report on gas solubility, diffusivity, and molecular restructuring in response to rapid decompression. Our simulations indicate that increases in crosslink density can reduce volumetric expansion during decompression and result in smaller free volume pore sizes. However, these favorable properties for sealing materials come with a tradeoff. At pressure, crosslinks introduce extra free volume, providing potential sites for gas localization, the precursor to cavitation-induced failure.

Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Program
Grant/Contract Number:
NA0003525; AC05-76RL01830
OSTI ID:
1870477
Report Number(s):
SAND2022-4219J; 704832
Journal Information:
International Journal of Hydrogen Energy, Journal Name: International Journal of Hydrogen Energy Journal Issue: 33 Vol. 47; ISSN 0360-3199
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (36)

Influence of carbon black on decompression failure and hydrogen permeation properties of filled ethylene-propylene-diene-methylene rubbers exposed to high-pressure hydrogen gas journal July 2011
Influence of Diffusivity and Sorption on Helium and Hydrogen Separations in Hydrocarbon, Silicon, and Fluorocarbon-Based Polymers journal April 2014
Inhomogeneity in acrylonitrile butadiene rubber during hydrogen elimination investigated by small-angle X-ray scattering journal January 2018
On key parameters influencing cavitation damage upon fast decompression in a hydrogen saturated elastomer journal December 2011
Swelling measurement during sorption and decompression in a NBR exposed to high-pressure hydrogen journal July 2017
A review on effect of hydrogen on rubber seals used in the high-pressure hydrogen infrastructure journal September 2020
Molecular Simulations of Solute Transport in Polymer Melts journal July 2017
Solid-State 1 H NMR Study on Chemical Cross-Links, Chain Entanglements, and Network Heterogeneity in Peroxide-Cured EPDM Rubbers journal December 2007
The finite difference thermodynamic integration, tested on calculating the hydration free energy difference between acetone and dimethylamine in water journal June 1987
Comments on P3M, FMM, and the Ewald method for large periodic Coulombic systems journal June 1996
Effects of fillers on the hydrogen uptake and volume expansion of acrylonitrile butadiene rubber composites exposed to high pressure hydrogen: -Property of polymeric materials for high pressure hydrogen devices (3)- journal January 2022
Materials Informatics with PoreBlazer v4.0 and the CSD MOF Database journal November 2020
Numerical integration of the cartesian equations of motion of a system with constraints: molecular dynamics of n-alkanes journal March 1977
Fast Parallel Algorithms for Short-Range Molecular Dynamics journal March 1995
Polymatic: a generalized simulated polymerization algorithm for amorphous polymers journal January 2013
Influence of fillers on hydrogen penetration properties and blister fracture of rubber composites for O-ring exposed to high-pressure hydrogen gas journal February 2009
Temperature-Dependent Elasticity of a Semicrystalline Interphase Composed of Freely Rotating Chains journal September 2003
NLDFT Pore Size Distribution in Amorphous Microporous Materials journal August 2017
Inhomogeneities and Chain Dynamics in Diene Rubbers Vulcanized with Different Cure Systems journal May 2010
Calculation of the free energy for gas absorption in amorphous polypropylene journal November 1991
Elasticity recovery of crosslinked EPDM: influence of the chemistry and nanofillers journal October 2020
Development and Testing of the OPLS All-Atom Force Field on Conformational Energetics and Properties of Organic Liquids journal January 1996
Cure and scorch in the processing of ethylene-propylene-diene terpolymer (EPDM) journal November 2016
Molecular simulations of gas transport in hydrogenated nitrile butadiene rubber and ethylene–propylene–diene rubber journal January 2020
Molecular Model for HNBR with Tunable Cross-Link Density journal December 2016
Correlation between fractional free volume and diffusivity of gas molecules in glassy polymers journal December 1999
Gas transport in ethylene–propylene–diene (EPDM) elastomer: Molecular simulation and experimental study journal October 2007
Damage evolution in polymer due to exposure to high-pressure hydrogen gas journal May 2021
Pore Size Distributions in Porous Glasses:  A Computer Simulation Study journal January 1999
Local kinetics of cavitation in hydrogen-exposed EPDM using in-situ X-Ray tomography: Focus on free surface effect and cavity interaction journal November 2020
H-Mat hydrogen compatibility of polymers and elastomers journal March 2021
Heterogeneity of a vulcanized rubber by the formation of ZnS clusters journal April 2007
Nanoscale fracture analysis by atomic force microscopy of EPDM rubber due to high-pressure hydrogen decompression journal November 2010
LAMMPS - a flexible simulation tool for particle-based materials modeling at the atomic, meso, and continuum scales journal February 2022
Evaluation of hydrogen permeation characteristics in rubbery polymers journal January 2021
Computational structure characterisation tools in application to ordered and disordered porous materials journal December 2011